Sommelier v8.0.0

This upgrade moves Sommelier to major version 8.

Summary of changes

• Add the addresses module for mapping cosmos/evm addresses
• Update the cellarfees module to start fee auctions based on the accrued USD value of a particular denom
• Update the auction module to allow a portion of SOMM proceeds earned by auctions to be burned
• Upgrade the gravity module to v5
• Update the incentives module to support validator-specific rewards subsidized by the community pool
• Adds additional events to x/cork and x/axelarcork to allow tooling to more easily track the status of corks
• Fixes ExportGenesis bug in x/axelarcork
• Fixes some help text and argument parsing bugs for various CLI commands